Improvement in lift and force pumps



T. B. SWAN.- LIFT AND FoRcE PUMP.4

. No. 192,950 v Panama July 1o', 1877;

l f hanmail/[WM wwNEss'Es'- ATTORNEY N.PETERS, FHDTO-LITHOGRAFHERWASHINGTON D C UNITED STATES PATENT EEJICEc3 THOMAS B. SWAN,OF`MEQHANICS FALLS, MAINE.

IMPROVEMENT IN LIFT AND FORCE PUMPS.

Specification forming part of Letters Patent No. 192,950, dated July10,1877; application filed June 23, 1877.

To all whom it may concern Beit known that I, THOMAS B. SWAN, ofMechanics Falls, in the county of Androscoggin and State of Maine, haveinvented a new and valuable Improvement in Lifting and Force Pumps; andI do hereby declare that the following is a full, clear, and exactdescription of the construction and operation of the" same, referencebeing had to the annexed drawings, making a part of this specification,and to the letters and figures of reference marked thereon.

Figure 1 of the drawings is a representation of a longitudinal centralsection of my improved pump; and Fig. 2 is a horizontal section thereof,taken through the line .fr m.

This invention has relation to improvements in double-acting force andlifting pumps and the nature of the invention consists in thecombination, with a pump-barrel closed' at its lower end, and providedat its upper end with a valve opening upward, a feed-pipe opening intothe bore a of said barrel midway of its length, and a lateral conduitclosed at its lower end, and provided atits upper end with a valveopening upward, of a double piston having in its lower end a valveopening downward, and in the upper end a valve opening upward, whereby apumpof exceptional excellence is obtained, as will be hereinafter morefully described.

In the accompanying drawings, the letter A designates a preferablycylindrical barrel, having an eccentric bore, a, that is open at bothends. This barrel has in its thicker wall a conduit, b, extending fromend to end of the barrel, as shown in Fig. 1. This barrel, with its boreand conduit, is preferably cast out of any suitable metal in one piece,though I do not propose to conlne myself to thisespecal construction.The ends of the barrel are closed by means of caps B, which are securedthereto by screws, or any other equivalent device, the upper cap havingaperI tures c c', leading, respectively, into the conduit and into thebarrel, as shown in Fig. l, that are closed by valves d d', openingupward. The conduit b aforesaid communicates with the bore a of thebarrel at its lower end by means of a passage, e.

C designates the feed-pipe, extending by `head or cap, B, that,

rel.

means of suitable connections into the well or cistern from which thewater is to be drawn, and opening into the bored of the barrel midway ofits length.

The lower end of the barrel is `closed by a -brating lever, F,whicl1,being pivoted to the end of the pistonrod aforesaid, will imparta reciprocating movement to the piston when 1t is operated.

The piston G is composed of two spaced suitablyLpacked disks, ti',connected by metallic rods j, and they are, respectively, provided withproper seats for valves, of which thelowermost, 7c, opens downward, andtheA uppermost, l, upward. These disks are so proportioned to the lengthof the stroke of the rod D, in their distance apart, that the lower disknever rises above the lower edge of the opening m of the feed-pipe intothe pumpbarrel, and the upper disk never descends below the upper edgeof said opening. In other words, its length is never less than thelength of the stroke of said rod. This latter is connected in anysuitable manner to the piston aforesaid.

When the operating-lever is thrust down,

the piston moves up "in its barrel until the lower disk t" reaches theopening m from the feed-tube into the barrel. The water is sucked up thefeed-tube into the barrel, thevalve Zin the upper disk, and that at theupper end of the conduit b, being closed, and that in the lower diskopen. When the downstroke of the piston commences, the valve in theupper end of the said conduit opens, that in the lower end of the pistoncloses, and a partial vacuum being created above said piston, waterrushes up the feed-pipe into the upper part of the pump-barrel, whilethat in the lower part thereof, raised by the upstroke, is forced upconduit b, through valve d, into the upper part of the pump above saidvalve. While like the other head,

the lower disk isforcing, the upper disk: is raising water, and acontinuous stream of wa. ter will pourfrom the spout.

It is evident that it is not essential that the lateral conduit shouldbe within the body of the pump-barrel, provided its lower end opens intosaid barrel, and its upper end into the upper part of the pump, and isprovided with a valve opening upward.

What I claim as new, and desire to secure by Letters Patent, is-

1. The pump-barrel consisting ofv the bore a, having opening m midway ofits length, for the reception of the feed-pipe, a closed lower end, anda valve, d', in its upper end opening upward, lin combination with thelateral conduitj b, having yat its lower enda passage, e, communicatingwith the lower end of said barrel, and at its upper end a valve, d,openinglupward into the body E of the pump, substantially as specied..

p communicatin-gatits lower., end with said bore, and having at itsupper enda valve, d, opening upward, with a piston, Gr, having at its'lower endia valve, kg, Iopening downward, and

avalve, Z, opening upward at its upper end, substantially as specified.

Inwtesstimony thatv Ilclairn the above I have hereunto subscribed myname in the presence of two witnesses.

THOMAS B. SWAN.

Witnesses :V

JOHN D. CURTIS, CHARLES F. BuowN.

